Study On Evaluation Of Water Environment Quality And Pollution Prevention And Control Of Lugu Lake In The State Of SiChuan

Lake is one of the most important freshwater resources in China,of which freshwater reserves of up to 225 billion m3,is an important source of drinking water in China,China's social and economic development plays an immeasurable role.However,with the development of society and the development of agriculture and industry,the untreated life and production wastewater are discharged directly to surface water such as lakes.When the discharged pollutants exceed the self-purification capacity of lake water,Pollution.Therefore,it is necessary to conduct an investigation and assessment of the water quality of the lake to make reasonable and effective suggestions for the protection of its water quality.Based on the results of principal component analysis of Lugu Lake,three of the most common methods for water environment assessment were used for evaluating the water environment quality of Lugu Lake,in order to give the water quality grade and major pollutants.As for the major pollutants of Lugu Lake,the cause analysis was made to give measures of prevention and pollution control.The specific research results are as follows:In this paper,the present situation of water quality in lake area is evaluated by exponential evaluation and gray relational analysis.The results show that the result of gray correlation analysis of Luguhu Liangshan Prefecture is Grade ?,and the result of water quality of grassland wetland is Grade ?.The overall water quality is the same as that of Class ? standard.The main pollutants For CODMn,TP,TN,the standard physical and chemical indicators for DO.The interannual variation of the water quality of Lugu Lake in Lugu Lake is not significant,but it is only four years since the pollution of the pollution to the lower pollution level is only four years,so the demand for water pollution control is urgent The The results of the spring monitoring of water quality in the three monitoring points of Anna Miao Island,Zhaojiawan and Long Island Bay fluctuated between Class ? and?,and the water quality was deteriorated.The results of the autumn monitoring of the three monitoring points changed little Water quality.The results of the monitoring of water quality in the Caohai Sea show that the water quality of most of the year is bad ?,or fluctuates between categories ? and ?,and the main reason is that the DO is seriously exceeded.In this paper,the comprehensive nutrition index method was used to evaluate the eutrophication degree of the lake area.The results showed that the eutrophication degree of Liangshu Lake in Lugu Lake was similar to that in the past 7 years,and the rising trend was not obvious,which indicated that the current eutrophication degree of Luguhu Liangshan Prefecture was very low.The degree of eutrophication is nutrition,and the eutrophication trend is presented.In the Luguhu Liangshan Prefecture,the total phosphorus and total nitrogen contents were negatively correlated with chlorophyll a,and the phosphorus element was the limiting factor of algae growth.At this time,the total phosphorus concentration was less than 0.02mg/L,which was not easy to occur Eutrophication was consistent with the results of the above comprehensive nutritional status index.In this paper,the water quality control measures are put forward from the present situation of water quality in Lianggu Lake,Lugu Lake,and the requirements and suggestions are put forward from the aspects of protection mechanism,infrastructure construction and tourism industry regulation,ecological environment protection and repair.